I usually use orthotics, but the end result lifts the heel up. That throws the alignment of the body off when rowing. I have been using some Tevas with Ortholite soles. They work pretty well. But I could use more arch, and these things
are already tight with paper thin socks.
I could use some suggestions, or perhaps a forum for rowing like this one.
Not really understanding what the issue has to do w/ your orthotics-- your heels are coming away from them? Sounds like your soleus is tight. Try some stretching (squat down, keeping heels on the floor). Could try the Earth shoes thing too-- for walking, I mean.